Hi,
I'm witnessing a unique problem with my voicemail system. In a random fashion, a humming type of noise is heard when retreiving email. when this happens, the 4 port analog card locks up for 3 minutes and when attempting to access the VM, it just rings until this noise is released. I have changed the voicemail hardware, no resolution. I have changed the analog card, no resolution. I have removed all amplifiers in the system as well as all extensions, no resolution. Everything is properly grounded and it has been power cycled.
Has anyone seem this problem in the past with resolution?

Thanks,